imapsieve: Fixed check for the presence of causes in a mailbox rule.

Problem found by GCC 7.
dovecot · Oct 5, 2017 · 15f9fd1 · 15f9fd1
1 parent 370b973
commit 15f9fd1
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/plugins/imapsieve/imap-sieve-storage.c b/src/plugins/imapsieve/imap-sieve-storage.c
@@ -1013,7 +1013,7 @@ imap_sieve_mailbox_rule_match_cause
 {
 	const char *const *cp;
 
-	if (rule->causes == NULL || *rule->causes == '\0')
+	if (rule->causes == NULL || *rule->causes == NULL)
 		return TRUE;
 
 	for (cp = rule->causes; *cp != NULL; cp++) {